Grinding-machine.



C. M. CONRADSON. GRINDING MACHINE. APPLICATION FILED AUG. 25,1908.

Patented Feb. 2, 1909.

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C. M. CONRADSON.

GRINDING MACHINE. APPLICATION FILED AUG.25,1908.

Patented Feb. 2, 1909,

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l u@ l Hoc G. M. CONRADSON. GRINDIN G MACHINE. APPLICATION FILED AUG. 25,1908.

Patented Feb. 2, 1909.

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'coNnAD 'Ml consensos, or MADisoN, wisconsin, s.srsieivoitv fro 'rnfneisioii enses GRLNDING iiiaciainiil coMrANr, or sioUX-FALLs soU'rn DAKo'r-A., -A consonancia.

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@BINDING-machina.

specification of 'Lettere Patent. Application nieu August 25,1903'. sesamo. 450,188.

Patented Feb. a, i969.

T o-all whom it 'mit/y condom: j J

Be it known :that AI, CONRAD M. ConmsoN, `citizen of the United States, residing at Madison, in the county of Dane and State of Wisconsin, have invented certain new and useful Improvements in Grinding-Machines, of which the following is a specification, reference being had therein to the accompanying drawing. l

This invention relates to a grinding machine adapted for thegrinding of glass bottle-necks and surfaces of other articles.

Among the objects of the invention, are the production of a grinding machine equipped with a plurality ofgrinding mechanisms that finish their work serz'atzm; the centralizing of the interior surface of the article to be ground byprovision of a special chuck member that. engages a previously formed chuck-engaging surface on the work; and anovel arrangement of cams and camactuated parts for actuation of the workchuCk, whereby, in connection with other movements of -the-work-chuck and of the grinding tool, the ground surface is properly finished. I

Referring to the accompanying drawings forming a part thereof,'Fignre 1 is a view, partly in elevation and partly in lengthwise section, on a line corresponding to line 1 1 of Fig. 2; Fig. 2 is, in part, a top plan view of a machine designed to carry three grinding mechanisms, each comprising a workchuck mechanism and a grinding tool mechanism, and the intermediate work-chuck being removed for greater clear'nes's. The figure is partly in horizontal section at a line corresponding to 2-2 of Fig. 1, for better illustration of one of the adjusting mechanisms of one of the work-chucks. Figs. 3, 4 and 5-each shows a work-chuck adjusting cam, these cams being in different positions to indicate different stages of each grinding operation; Fig. 6 is a front elevation of the adjusting mechanismof a workchuck; Fig. 7 is a horizontal section thereof at line 2-2 of'Fig. l or 7-7 vof Fig. 6; Fig. .8 is a diagrammatic development of the cam groove of the cams shown in 3, 4 and 5; Fig. 9 is an enlarged sectional detail, at a line corresponding to 1-1 of Fig. 2, of the angular relation of the grinding pencil and surface being ground; and of the chuck member that engages a chuckengaging surface.

In 'the drawings, 1 indicatesv the main frame comprising parallel vertical, side pieces and transverse connections. Drive shaft 2 extends transversely of the frame at the rear portion thereof, and is mounted inl side bearings 3. It is provided 'near each end with an 'eccentric 4. These are connected by eccentric straps 5 with transverse y shaft 6 mounted on slide 7, which is mounted .ron the horizontal ways 8. Rotation of eccentric 4 reciprocates slide 7 'which carries threel tool spindles each comprising a to'ol spindle frame 9 provided with i'ipri htsg the upper ends of which are forme with bearings 10 for lthe rotatable tool spindle 11 provided at its front end with chuck 12 to hold the lgrinding pencil 13. Each fool spindle 1'1 is conveniently provided with a A fixed shell 11"5l between opposed walls of bearings 10 and is rotated lby a belt 11".

Shaft 2 is for a belt 2b, so that tool slide 7 ,may b e reciprocated tol'move the pencil endwise, independently 'of the movements ofthe 'workchuck. The grindin'glsurface of each peneil is cone-shaped.

In the main frame there is mounted 'a transverse ldrive vshaft 15 providedwitha belt pulley 16 for drive belt 16a. Shaft 15 is also provided with a fixed gear 17 which meshes with a gear 18 fast on a transverse shaft 19 journaled in the sides of the main frame above the transverse lshaft 145. Shaft 19 is provided with a fixed 'gear 20 which ineshes'with a `gear 20a, f as't on a transverse shaft 23 'also jonrnaled in the sides of the main frame. Shaft. '23, between its ends, carries three cams, each of whichis for effecting adjustments of the work chuck whereby the work is fed or moved laterally against the conical end 14 of pencil 13.

j As the work-chucks, their adjustable supporting mechanism 'and cam connections' are identical, descriptionof oiie set w'ill for all, as follows :-Each cani 21 is splin'ed at 22tothe shaft 23 andprovided witha Can groove 24 having a high point 25. Groove 24 receives a camroll 26 onl an end of cam lever 27 fulcru'med at 28 vto the main fratrie and provided at its front end with an antlf'riction roll which engages the lower end of a screw 30 provided with a vertical slot which receives a spline 3l in the adjustable.

under end 33 of the' screw rests on, and the' can 1er and Work-chuck frame and median-" ism are supported on, cam roll 29, the carrier32 being mounted in-reeess 34 formed in the main frame at three sides of the carrier, which is provided with opposite lateral wings 35 that slide vertically i'n ways formed by offset walls of the main frame and detachable plates 35a, the carrier being raised by upward movement of the front end of cam lever 27 and falling by gravity so that the lower end of screw 30 always rests on the anti-friction roll 29. Screw block 32 is ehambered for reception of a nut 36 on screw 30, this nut being provided between its ends with a bevel gear 37. The opposite A41 which is fast thereon.

ends of nut 36 bear against opposed walls of the chamber of the carrier, and the bevel gear 38, mounted on a spindle 39 and provided exteriorly with a hand wheel 40,

' meshes with bevel gear 37, so that whenever desired, rotation of bevel gear 38 will turn bevel gear 37 and nut 3G and compel screw 30 to move endwise in block 32, although itself non-rotatable. Consequently the lwork-chuck may be moved towards, against or away from the grinding pencil by manipulation of hand wheel 40. The purpose of this adjustment is to adjust the work-chuck and grinding spindle in correct relation one to the other, and also to compensate for wear of the grinding pencil.

Carrier 32 supports the work-chuck frame Frame 41 is provided. with vertical uprights 4l, the upper ends of which areV provided with bearings 42 to support the rotatable work-chuck 43 within which the bottles or other work are held during the grinding operation.

The front end of the work-chuck is provided with an exteriorly threaded and thereby adjustable annulus 44, the inner wall of which is shaped to fit the previously formed chuck-engaging surface :n of the bottle w1. This annulus or its equivalent is an important feature of the chuck and of my invention, for the previously formed chuck-engaging surface of the bottle is concentric with the longitudinal axis ofl the bottle-neck or interior surface to be ground, and consequently when the bottle or 'other work is rotated in the chuck, it rotates concentrically to the longitudinal axis of the surface to be ground, so that contact of the work surface of the grinding pencil grinds the interior of the bottle-neck or other work concentrically to said axis and thereby adapts the bottle-neck or other article for proper reception of a properly ground bottle-stopper.

The peripheral wall of the work-chuck is slotted at 45 s'o that the bottle or work may be inserted and removed through these slots. The work-,chuck is provided with a slidably mounted, spring-pressed clamp 46 for holdingthe bottom of the bottle and "pressix'ig the bottle against the annulus 44, which is thus shaped to permit passage of the grinding pencil for contact with the interior surface to be ground. Clamp 4G is provided with a spindle 47, and a coiled spring 48 is mounted around spindle 47, between the solid front end 49 of the chuck and the slidable clamp 4G. The exterior of operation with clutch number 50 on the opposed end of belt pulley 51, which is rotated by a belt 52 and provided with a groove 53 for reception of an end of a bellcrank lever 54, pivoted at to a projection 55 of frame 41. The other end of the bellcrank lever-is loosely jointed at. 56110 a `treadle-rod 57, the lower end of which is pivoted at 58 to ,trcadle 59 pivoted at Gt). When it is desired to retract. clamp 4G, in order to remove or insert a bottle through a slot 45, the treadle is depressed and clamp 46 consequently retracted. lVhcn a fresh bottle is put in place, the trcadle is released and the spring 48 presses clamp 4G against the bottom of the freshly inserted bottle; and the counter weight lV on thc treadlc, lifts the latter and causes engagement of the clutch-1nembers- The operation of each cam 21 is such as to move the work-chuck` while the latter and the grinding pencil are being rotated, to keep the conical end ot' the pencil and the surface of the bottle-neck being ground in constant engagement; and hand wheel 40 is used for adjusting screw 30 in such wise as to bring the longitudinal axis of each chuck, or rather` of the bottle held by the chuck, nearer to or farther away from the longitudinal axis of the grinding pencil, in order to adapt each set of grinding apparatus for bottle-necks of any given diameter; and to regulate the contact of the work and grindingl pencil.

So far as described, the operatlon of each of the plurality sets of grinding mechanism is identical, but it is to be noted that the cams 21 are splined on shaft 23 with their high points 25 in different positions, so that when one set of grinding apparatus is finishing its work, others will he atl ditferent stages of their respective grinding operations. Thus while the grinding operations completed scm'atim, and a single attendant will suiice for one machine having a consid erable number of grinding mechanisms.

It will be noted that the longitudinal axis of the work-chuck, in the present form of my invention, is at an angle of 5to to the horizontal lane. of the reciprocation of the tool spindle, and that the longitudinal axis of the latter is at an angle of 11 to said horizontal plane of reeiprocation. Conscquently the conical end of the grinding penare largely siumltaneruis` yet they are being' clamp 49 is formed as clutch member for co- .31

cil is maintained as its grinding surface is j,

traversed or moved endwise.

estero worn away. l In other' forms of. my .invention, the said angles Ymay' be varied te suit other conditions.

A leading object of this invention is lto produce a practically efficient machine for grinding glass surfaces whereby interchangeable, ground, glass bottle-necks and` ground, glass Stoppers therefor may be manufactured in large'quantities. i

Both the work-chuck and tool spindle vmay be .rotated or only one of them rotated. In general ractice the tool spindle is always rotated; ut in the'grinding of stopper seats, both will ordinarily be rotated and (Fig. 8) the cams 21 are formed with an idle portion a which will hold the bottle-neck so that the grinding pencil is not in engagement with lits surface, and at which time one bottle may be removed and another be placed in the chuck for grinding. Each cam also has a feed portion a1, during the engagement of which, by the cam-roll 26, the work-chuck and tool spindle are brought into grinding relations, the rotating and reciprocatingv pencil grinding down the surface of the inside of'the bottle-neck to a pre-determined extent; the cam also has an idle. portion a2 which effects the holding of the bottle in grinding position without feeding up tothe pencil, so that the pencil vwill be permitted to finish and smooth oif the ground surface. The cam also is provided with a quick acting return portion a3, the effect of which is to withdraw the bottle-neck from the pencil and bring it into idlep position for removal through th slots 45. ,l- The feed portion a1 feeds the work-chuck into grinding contact with the pencil and keeps pushing the glass against the pencil until the highest point of the cam is reached, where the portion a2 bevcomes effective. ,During the time in which the roll 26 is Working on. cam portion a2, the pencil should be simultaneously rotated and When the traversing movement is completed, the roll 26 is still on aportion of a2, and while the roll is on this portion the feeding movement is suspended, the traversing and rotative movements of the tool being continued until the roll 26 runs on the portion'as. The traversing movement Vof the pencil during the time roll 26 is on portion a2 comprises a considerable number of to-and-fro movements of the working surface of the pencil across a glass surface to be ground; and

these repeated to-and-fromovements result in the smoothing down of the ground surface formed while roll26 is on the cam vportion a2. The last part of portion af-- is Iso` formed as to greatly reduce the amount of material during each traverse, thereby beginn ing the final smoothingl or finishing operation. The actual curvature of 'the camgro-ove 24 is indicated in Figs. 1, 3,V 4 and 5,

and the diagrammatic Fig. 8 further illustrates ehmcter of the .movements obtained the cani-groove 24 and cam-- wheel 26.

My' invention may be embodiedin forms other than shown, if so desired.

What I `claim is:- 1. In a grinding inachine,the combination of a work-chuck and a tool spindle mounted' an angle one with their longitudinal aXes at to the other; means for edecting a relative rotary movement of the chuck and spindle one to the other; means for effecting a relative traversing movement of the chuck and spindle one to the other; means for effecting a relative feeding movement of the chuck and spindle one to the other; and means for arresting the feeding movement during said relative reciprocating movement.

" 2. In a grinding machine, the combination of a plurality of work-chucks and tool spindles arranged in sets on a main frame with the longitudinal axes of the chucks and spin- (iles at an angle one to the other; means for effecting a relative rotary movement one to the other of thev chucks and spindles in each set; means for effecting a relative traversing movement one to the other of the chucks and .spindles in each set; means for effecting a relative feeding movement one to the other of .the chucks and spindles in each set; a driving mechanism common to all the sets and including means whereby the sets complete the work seratz'm.

3. In a grinding machine, the combination of a workhuck and tool spindle mounted with their longitudinal axes at an angle one to the other; means for effecting a relative rotary movement one to the other of the chuck and spindle; means for effecting a relative traversing movement one to the other of the chuck and spindle; means for effecting a relative feeding movement one to ioo the other of the chuck and spindle; means for adjusting the chuck towards and away from' the longitudinal axis of the tool spindle; a work-engaging member in said chuck and formed with a surface for engagement with a previously .formed chuck-engaging surface on the work and shaped to permit passage of the grinding tool without contact therewith; a slidable work clamp in the chuck; means Work and means for causingv it to engage the Work and to hold the same against said work-engaging member.

4. In a grinding machine, the combination with a work-chuck andtool-spindle mounted with their longitudinal axes angularly disposed one'to the other of a work-chuck support movable in a path at an angle to the longitudinal axis of the work-chuck, and means for moving said support.

5. In -a grinding machine, the combination `with a work-chuck and tool-spindle mounted for retracting it from theto the other, spindle; means for reciprocating said slide; a Work-chuck support movable at an angle to the longitudinal axes of the Work-chuck, and means for moving said support.

6. In a grinding machine, the combination of a Work-chuck; a tool-spindle; a grinding tool carried thereby; means for eecting Working relations of the chuck and grinding tool; and means for actuating the chuck to bring it successively into, with reference to Work in the chuck, an idle position; a grinding position; a position for grinding withoutv feeding; and its return idle position; means for effecting a relative rotary movement of the chuck and spindle one to the other; means for reciprocating the toolspindle; and means for effecting a feed movement of thel Work-chuck.

7. In a machine for spirally grinding interchangeable, spirally ground glass bottle necks and glass Stoppers therefor, and other articles, the combination of a plurality of work-holders; a plurality of grinding tools; the work-holders and grinding tools coperating in pairs; and automatic mechanism for successively throwing each of said pairs' out of operation.

8. The combination of a work-holder; a

of a slide carrying the tooltary movement of said holders;

grinding tool holder; a grinding tool; means for effecting a rotatable movement of said work-holder and tool, one in relation to the other; means for traversing the tool and work, one in relation to the other, during said rotative movement, in a path parallel to the surface of the work to be ground at the line of contact between the working face of the tool and the work; and a mechanism comprising a succession of operative parts,

one for holding said holders out of their f grinding position; a second for moving said holders into their grinding position; a third for holding said holders stationary in their grinding position; and a fourth for moving said holders out of their grinding position. 9. The combination of a tool-holder; a work-holder; means for effecting relative roa reciprocating carrier for said work-holder; means for moving said carrier; justing said work-holder.

In testimony whereof I have aflixed my signature in presence of two witnesses.

CONRAD M. CONRADSON.

Witnesses EDWARD S. BEACH, F. E. NAnrs.

and means for ad 1 

